Are t-top covers necessary? Let us rephrase that...are your boat's center console, steering wheel, and gauges necessary? Protect your boat's t-top center console and all its related equipment from harmful UV rays, saltwater and other elements. Overton's selection of t-top covers attach directly beneath the t-top and is available in small, medium, and large sizes. Use our Boat Cover Selector Tool to find the right cover for your boat.